2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <vlib/vlib.h>
17 #include <vlib/unix/plugin.h>
18 #include <vlibmemory/api.h>
19 #include <vpp/app/version.h>
20 #include <vnet/vnet.h>
21 #include <vnet/pg/pg.h>
22 #include <vppinfra/error.h>
23 #include <vppinfra/random.h>
24 #include <vnet/udp/udp.h>
25 #include <vnet/ipsec/ipsec.h>
26 #include <vnet/ipsec/ipsec_tun.h>
27 #include <vnet/ipip/ipip.h>
28 #include <plugins/ikev2/ikev2.h>
29 #include <plugins/ikev2/ikev2_priv.h>
30 #include <openssl/sha.h>
32 ikev2_main_t ikev2_main;
34 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
36 ikev2_child_sa_t * child);
38 #define ikev2_set_state(sa, v) do { \
40 ikev2_elog_sa_state("ispi %lx SA state changed to " #v, sa->ispi); \
50 format_ikev2_trace (u8 * s, va_list * args)
52 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
53 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
54 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
56 s = format (s, "ikev2: sw_if_index %d, next index %d",
57 t->sw_if_index, t->next_index);
61 static vlib_node_registration_t ikev2_node;
63 #define foreach_ikev2_error \
64 _(PROCESSED, "IKEv2 packets processed") \
65 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
66 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
67 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
68 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
69 _(NOT_IKEV2, "Non IKEv2 packets received")
73 #define _(sym,str) IKEV2_ERROR_##sym,
79 static char *ikev2_error_strings[] = {
80 #define _(sym,string) string,
87 IKEV2_NEXT_IP4_LOOKUP,
88 IKEV2_NEXT_ERROR_DROP,
92 static ikev2_sa_transform_t *
93 ikev2_find_transform_data (ikev2_sa_transform_t * t)
95 ikev2_main_t *km = &ikev2_main;
96 ikev2_sa_transform_t *td;
98 vec_foreach (td, km->supported_transforms)
100 if (td->type != t->type)
103 if (td->transform_id != t->transform_id)
106 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
108 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
109 || t->attrs[1] != 14)
112 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
120 static ikev2_sa_proposal_t *
121 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
122 ikev2_protocol_id_t prot_id)
124 ikev2_sa_proposal_t *rv = 0;
125 ikev2_sa_proposal_t *proposal;
126 ikev2_sa_transform_t *transform, *new_t;
127 u8 mandatory_bitmap, optional_bitmap;
129 if (prot_id == IKEV2_PROTOCOL_IKE)
131 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
132 (1 << IKEV2_TRANSFORM_TYPE_PRF) |
133 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
134 optional_bitmap = mandatory_bitmap;
136 else if (prot_id == IKEV2_PROTOCOL_ESP)
138 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
139 (1 << IKEV2_TRANSFORM_TYPE_ESN);
140 optional_bitmap = mandatory_bitmap |
141 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
143 else if (prot_id == IKEV2_PROTOCOL_AH)
145 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
146 (1 << IKEV2_TRANSFORM_TYPE_ESN);
147 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
152 vec_add2 (rv, proposal, 1);
154 vec_foreach (proposal, proposals)
157 if (proposal->protocol_id != prot_id)
160 vec_foreach (transform, proposal->transforms)
162 if ((1 << transform->type) & bitmap)
165 if (ikev2_find_transform_data (transform))
167 bitmap |= 1 << transform->type;
168 vec_add2 (rv->transforms, new_t, 1);
169 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
170 new_t->attrs = vec_dup (transform->attrs);
174 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
175 (bitmap & ~optional_bitmap) == 0)
177 rv->proposal_num = proposal->proposal_num;
178 rv->protocol_id = proposal->protocol_id;
179 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
184 vec_free (rv->transforms);
193 ikev2_sa_transform_t *
194 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
195 ikev2_transform_type_t type)
197 ikev2_sa_transform_t *t;
202 vec_foreach (t, p->transforms)
205 return ikev2_find_transform_data (t);
211 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
215 vec_foreach (c, sa->childs)
217 ikev2_sa_proposal_t *proposal =
218 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
219 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
227 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
229 ikev2_sa_proposal_t *p;
230 ikev2_sa_transform_t *t;
237 vec_foreach (t, p->transforms)
241 vec_free (p->transforms);
247 ikev2_sa_free_child_sa (ikev2_child_sa_t * c)
249 ikev2_sa_free_proposal_vector (&c->r_proposals);
250 ikev2_sa_free_proposal_vector (&c->i_proposals);
260 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
263 vec_foreach (c, *childs) ikev2_sa_free_child_sa (c);
269 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
271 ikev2_sa_free_child_sa (child);
272 vec_del1 (sa->childs, child - sa->childs);
276 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
278 vec_free (sa->i_nonce);
279 vec_free (sa->i_dh_data);
280 vec_free (sa->dh_shared_key);
281 vec_free (sa->dh_private_key);
283 ikev2_sa_free_proposal_vector (&sa->r_proposals);
284 ikev2_sa_free_proposal_vector (&sa->i_proposals);
287 vec_free (sa->sk_ai);
288 vec_free (sa->sk_ar);
289 vec_free (sa->sk_ei);
290 vec_free (sa->sk_er);
291 vec_free (sa->sk_pi);
292 vec_free (sa->sk_pr);
294 vec_free (sa->i_id.data);
295 vec_free (sa->i_auth.data);
296 vec_free (sa->r_id.data);
297 vec_free (sa->r_auth.data);
299 EVP_PKEY_free (sa->r_auth.key);
303 ikev2_sa_free_all_child_sa (&sa->childs);
307 ikev2_delete_sa (ikev2_sa_t * sa)
309 ikev2_main_t *km = &ikev2_main;
310 u32 thread_index = vlib_get_thread_index ();
313 ikev2_sa_free_all_vec (sa);
315 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
318 hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
319 pool_put (km->per_thread_data[thread_index].sas, sa);
324 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
326 ikev2_sa_transform_t *t = 0, *t2;
327 ikev2_main_t *km = &ikev2_main;
329 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
334 /* check if received DH group is on our list of supported groups */
335 vec_foreach (t2, km->supported_transforms)
337 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
346 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
350 if (sa->is_initiator)
353 RAND_bytes ((u8 *) & sa->ispi, 8);
356 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
357 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
362 RAND_bytes ((u8 *) & sa->rspi, 8);
365 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
366 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
369 /* generate dh keys */
370 ikev2_generate_dh (sa, t);
375 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
377 ikev2_sa_transform_t *t = 0, *t2;
378 ikev2_main_t *km = &ikev2_main;
381 /*move some data to the new SA */
382 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
383 sa->i_nonce = _(sai->i_nonce);
384 sa->i_dh_data = _(sai->i_dh_data);
385 sa->dh_private_key = _(sai->dh_private_key);
386 sa->iaddr.as_u32 = sai->iaddr.as_u32;
387 sa->raddr.as_u32 = sai->raddr.as_u32;
388 sa->is_initiator = sai->is_initiator;
389 sa->i_id.type = sai->i_id.type;
390 sa->profile_index = sai->profile_index;
391 sa->is_profile_index_set = sai->is_profile_index_set;
392 sa->tun_itf = sai->tun_itf;
393 sa->is_tun_itf_set = sai->is_tun_itf_set;
394 sa->i_id.data = _(sai->i_id.data);
395 sa->i_auth.method = sai->i_auth.method;
396 sa->i_auth.hex = sai->i_auth.hex;
397 sa->i_auth.data = _(sai->i_auth.data);
398 sa->i_auth.key = _(sai->i_auth.key);
399 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
400 sa->childs = _(sai->childs);
401 sa->udp_encap = sai->udp_encap;
402 sa->dst_port = sai->dst_port;
406 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
411 /* check if received DH group is on our list of supported groups */
412 vec_foreach (t2, km->supported_transforms)
414 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
423 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
428 /* generate dh keys */
429 ikev2_complete_dh (sa, t);
434 ikev2_calc_keys (ikev2_sa_t * sa)
437 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
440 u16 integ_key_len = 0;
441 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
443 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
445 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
447 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
450 integ_key_len = tr_integ->key_len;
452 vec_append (s, sa->i_nonce);
453 vec_append (s, sa->r_nonce);
454 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
456 /* Calculate S = Ni | Nr | SPIi | SPIr */
458 vec_add2 (s, tmp, 2 * sizeof (*spi));
460 spi[0] = clib_host_to_net_u64 (sa->ispi);
461 spi[1] = clib_host_to_net_u64 (sa->rspi);
463 /* calculate PRFplus */
465 int len = tr_prf->key_trunc + /* SK_d */
466 integ_key_len * 2 + /* SK_ai, SK_ar */
467 tr_encr->key_len * 2 + /* SK_ei, SK_er */
468 tr_prf->key_len * 2; /* SK_pi, SK_pr */
470 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
477 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
478 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
479 pos += tr_prf->key_trunc;
484 sa->sk_ai = vec_new (u8, integ_key_len);
485 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
486 pos += integ_key_len;
489 sa->sk_ar = vec_new (u8, integ_key_len);
490 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
491 pos += integ_key_len;
495 sa->sk_ei = vec_new (u8, tr_encr->key_len);
496 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len);
497 pos += tr_encr->key_len;
500 sa->sk_er = vec_new (u8, tr_encr->key_len);
501 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len);
502 pos += tr_encr->key_len;
505 sa->sk_pi = vec_new (u8, tr_prf->key_len);
506 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
507 pos += tr_prf->key_len;
510 sa->sk_pr = vec_new (u8, tr_prf->key_len);
511 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
512 pos += tr_prf->key_len;
518 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
521 u16 integ_key_len = 0;
524 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
526 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
528 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
530 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
533 integ_key_len = ctr_integ->key_len;
535 salt_len = sizeof (u32);
537 vec_append (s, sa->i_nonce);
538 vec_append (s, sa->r_nonce);
539 /* calculate PRFplus */
541 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
543 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
548 child->sk_ei = vec_new (u8, ctr_encr->key_len);
549 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
550 pos += ctr_encr->key_len;
555 child->sk_ai = vec_new (u8, ctr_integ->key_len);
556 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
557 pos += ctr_integ->key_len;
561 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
566 child->sk_er = vec_new (u8, ctr_encr->key_len);
567 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
568 pos += ctr_encr->key_len;
573 child->sk_ar = vec_new (u8, integ_key_len);
574 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
575 pos += integ_key_len;
579 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
589 ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa,
593 u32 len = clib_net_to_host_u32 (ike->length);
594 u8 payload = ike->nextpayload;
596 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
598 clib_net_to_host_u64 (ike->ispi),
599 clib_net_to_host_u64 (ike->rspi), sa->iaddr.as_u32);
601 sa->ispi = clib_net_to_host_u64 (ike->ispi);
603 /* store whole IKE payload - needed for PSK auth */
604 vec_free (sa->last_sa_init_req_packet_data);
605 vec_add (sa->last_sa_init_req_packet_data, ike, len);
607 while (p < len && payload != IKEV2_PAYLOAD_NONE)
609 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
610 u32 plen = clib_net_to_host_u16 (ikep->length);
612 if (plen < sizeof (ike_payload_header_t))
615 if (payload == IKEV2_PAYLOAD_SA)
617 ikev2_sa_free_proposal_vector (&sa->i_proposals);
618 sa->i_proposals = ikev2_parse_sa_payload (ikep);
620 else if (payload == IKEV2_PAYLOAD_KE)
622 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
623 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
624 vec_free (sa->i_dh_data);
625 vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke));
627 else if (payload == IKEV2_PAYLOAD_NONCE)
629 vec_free (sa->i_nonce);
630 vec_add (sa->i_nonce, ikep->payload, plen - sizeof (*ikep));
632 else if (payload == IKEV2_PAYLOAD_NOTIFY)
634 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
637 else if (payload == IKEV2_PAYLOAD_VENDOR)
639 ikev2_parse_vendor_payload (ikep);
643 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
645 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
647 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
648 sa->unsupported_cp = payload;
653 payload = ikep->nextpayload;
657 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
661 ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa,
665 u32 len = clib_net_to_host_u32 (ike->length);
666 u8 payload = ike->nextpayload;
668 sa->ispi = clib_net_to_host_u64 (ike->ispi);
669 sa->rspi = clib_net_to_host_u64 (ike->rspi);
671 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
672 "from %d.%d.%d.%d", sa->ispi, sa->rspi,
675 /* store whole IKE payload - needed for PSK auth */
676 vec_free (sa->last_sa_init_res_packet_data);
677 vec_add (sa->last_sa_init_res_packet_data, ike, len);
679 while (p < len && payload != IKEV2_PAYLOAD_NONE)
681 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
682 u32 plen = clib_net_to_host_u16 (ikep->length);
684 if (plen < sizeof (ike_payload_header_t))
687 if (payload == IKEV2_PAYLOAD_SA)
689 ikev2_sa_free_proposal_vector (&sa->r_proposals);
690 sa->r_proposals = ikev2_parse_sa_payload (ikep);
693 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
695 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
698 else if (payload == IKEV2_PAYLOAD_KE)
700 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
701 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
702 vec_free (sa->r_dh_data);
703 vec_add (sa->r_dh_data, ke->payload, plen - sizeof (*ke));
705 else if (payload == IKEV2_PAYLOAD_NONCE)
707 vec_free (sa->r_nonce);
708 vec_add (sa->r_nonce, ikep->payload, plen - sizeof (*ikep));
710 else if (payload == IKEV2_PAYLOAD_NOTIFY)
712 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
715 else if (payload == IKEV2_PAYLOAD_VENDOR)
717 ikev2_parse_vendor_payload (ikep);
721 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
723 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
725 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
726 sa->unsupported_cp = payload;
731 payload = ikep->nextpayload;
737 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload)
742 u32 len = clib_net_to_host_u32 (ike->length);
743 ike_payload_header_t *ikep = 0;
745 ikev2_sa_transform_t *tr_integ;
747 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
750 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
752 ikep = (ike_payload_header_t *) & ike->payload[p];
753 plen = clib_net_to_host_u16 (ikep->length);
755 if (plen < sizeof (*ikep))
758 if (*payload == IKEV2_PAYLOAD_SK)
760 last_payload = *payload;
764 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
766 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
768 sa->unsupported_cp = *payload;
773 *payload = ikep->nextpayload;
777 if (last_payload != IKEV2_PAYLOAD_SK)
779 ikev2_elog_error ("Last payload must be SK");
784 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
785 (u8 *) ike, len - tr_integ->key_trunc);
787 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
789 if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
791 ikev2_elog_error ("message integrity check failed");
797 return ikev2_decrypt_data (sa, ikep->payload, plen);
801 ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
803 ikev2_main_t *km = &ikev2_main;
807 u32 thread_index = vlib_get_thread_index ();
809 if (!sa->initial_contact)
812 /* find old IKE SAs with the same authenticated identity */
814 pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
815 if (tmp->i_id.type != sa->i_id.type ||
816 vec_len(tmp->i_id.data) != vec_len(sa->i_id.data) ||
817 memcmp(sa->i_id.data, tmp->i_id.data, vec_len(sa->i_id.data)))
820 if (sa->rspi != tmp->rspi)
821 vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
825 for (i = 0; i < vec_len (delete); i++)
828 pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
830 tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main,
832 ikev2_delete_sa (tmp);
836 sa->initial_contact = 0;
840 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike)
842 ikev2_child_sa_t *first_child_sa;
844 u8 payload = ike->nextpayload;
846 ike_payload_header_t *ikep;
849 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
850 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
851 clib_host_to_net_u64 (ike->rspi),
852 sa->is_initiator ? sa->raddr.as_u32 : sa->
855 ikev2_calc_keys (sa);
857 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
861 if (sa->unsupported_cp)
862 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
863 goto cleanup_and_exit;
866 /* select or create 1st child SA */
867 if (sa->is_initiator)
869 first_child_sa = &sa->childs[0];
873 ikev2_sa_free_all_child_sa (&sa->childs);
874 vec_add2 (sa->childs, first_child_sa, 1);
878 /* process encrypted payload */
880 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
882 ikep = (ike_payload_header_t *) & plaintext[p];
883 plen = clib_net_to_host_u16 (ikep->length);
885 if (plen < sizeof (ike_payload_header_t))
886 goto cleanup_and_exit;
888 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
890 if (sa->is_initiator)
892 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
893 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
897 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
898 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
901 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
903 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
905 sa->i_id.type = id->id_type;
906 vec_free (sa->i_id.data);
907 vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
909 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
911 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
913 sa->r_id.type = id->id_type;
914 vec_free (sa->r_id.data);
915 vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
917 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
919 ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
921 if (sa->is_initiator)
923 sa->r_auth.method = a->auth_method;
924 vec_free (sa->r_auth.data);
925 vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
929 sa->i_auth.method = a->auth_method;
930 vec_free (sa->i_auth.data);
931 vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
934 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
936 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
937 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
939 sa->initial_contact = 1;
943 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
945 ikev2_parse_vendor_payload (ikep);
947 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
949 vec_free (first_child_sa->tsi);
950 first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
952 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
954 vec_free (first_child_sa->tsr);
955 first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
959 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
962 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
964 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
965 sa->unsupported_cp = payload;
970 payload = ikep->nextpayload;
975 vec_free (plaintext);
979 ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
983 u8 payload = ike->nextpayload;
985 ike_payload_header_t *ikep;
988 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
989 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
990 clib_host_to_net_u64 (ike->rspi), sa->iaddr.as_u32);
992 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
995 goto cleanup_and_exit;
997 /* process encrypted payload */
999 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1001 ikep = (ike_payload_header_t *) & plaintext[p];
1002 plen = clib_net_to_host_u16 (ikep->length);
1004 if (plen < sizeof (ike_payload_header_t))
1005 goto cleanup_and_exit;
1007 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1009 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1010 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1011 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1014 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1016 sa->del = ikev2_parse_delete_payload (ikep);
1018 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1020 ikev2_parse_vendor_payload (ikep);
1024 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1026 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1028 sa->unsupported_cp = payload;
1033 payload = ikep->nextpayload;
1038 vec_free (plaintext);
1042 ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
1046 u8 payload = ike->nextpayload;
1049 u8 nonce[IKEV2_NONCE_SIZE];
1051 ike_payload_header_t *ikep;
1053 ikev2_notify_t *n = 0;
1054 ikev2_ts_t *tsi = 0;
1055 ikev2_ts_t *tsr = 0;
1056 ikev2_sa_proposal_t *proposal = 0;
1057 ikev2_child_sa_t *child_sa;
1059 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received "
1060 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1061 clib_host_to_net_u64 (ike->rspi), sa->raddr.as_u32);
1063 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1066 goto cleanup_and_exit;
1068 /* process encrypted payload */
1070 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1072 ikep = (ike_payload_header_t *) & plaintext[p];
1073 plen = clib_net_to_host_u16 (ikep->length);
1075 if (plen < sizeof (ike_payload_header_t))
1076 goto cleanup_and_exit;
1078 else if (payload == IKEV2_PAYLOAD_SA)
1080 proposal = ikev2_parse_sa_payload (ikep);
1082 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1084 n = ikev2_parse_notify_payload (ikep);
1085 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1090 else if (payload == IKEV2_PAYLOAD_DELETE)
1092 sa->del = ikev2_parse_delete_payload (ikep);
1094 else if (payload == IKEV2_PAYLOAD_VENDOR)
1096 ikev2_parse_vendor_payload (ikep);
1098 else if (payload == IKEV2_PAYLOAD_NONCE)
1100 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
1102 else if (payload == IKEV2_PAYLOAD_TSI)
1104 tsi = ikev2_parse_ts_payload (ikep);
1106 else if (payload == IKEV2_PAYLOAD_TSR)
1108 tsr = ikev2_parse_ts_payload (ikep);
1112 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1114 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1116 sa->unsupported_cp = payload;
1121 payload = ikep->nextpayload;
1125 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1127 ikev2_rekey_t *rekey = &sa->rekey[0];
1128 rekey->protocol_id = proposal->protocol_id;
1130 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1131 rekey->i_proposal->spi = rekey->spi;
1132 rekey->r_proposal = proposal;
1136 vec_free (sa->r_nonce);
1137 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1138 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1141 child_sa->rekey_retries = 0;
1146 ikev2_rekey_t *rekey;
1147 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1150 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1152 goto cleanup_and_exit;
1154 vec_add2 (sa->rekey, rekey, 1);
1155 rekey->protocol_id = n->protocol_id;
1156 rekey->spi = n->spi;
1157 rekey->i_proposal = proposal;
1159 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1163 vec_free (sa->i_nonce);
1164 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1165 /* generate new Nr */
1166 vec_free (sa->r_nonce);
1167 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
1168 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1172 vec_free (plaintext);
1177 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1185 ikev2_sa_transform_t *tr_prf;
1188 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1194 nonce = sa->i_nonce;
1195 packet_data = sa->last_sa_init_res_packet_data;
1201 nonce = sa->r_nonce;
1202 packet_data = sa->last_sa_init_req_packet_data;
1205 data = vec_new (u8, 4);
1207 vec_append (data, id->data);
1209 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1210 vec_append (authmsg, packet_data);
1211 vec_append (authmsg, nonce);
1212 vec_append (authmsg, id_hash);
1220 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1222 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1223 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1224 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1225 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1232 ikev2_sa_match_ts (ikev2_sa_t * sa)
1234 ikev2_main_t *km = &ikev2_main;
1236 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1240 pool_foreach (p, km->profiles, ({
1242 if (sa->is_initiator)
1256 if (p->rem_id.type != id->type ||
1257 vec_len(p->rem_id.data) != vec_len(id->data) ||
1258 memcmp(p->rem_id.data, id->data, vec_len(p->rem_id.data)))
1261 vec_foreach(ts, sa->childs[0].tsi)
1263 if (ikev2_ts_cmp(p_tsi, ts))
1265 vec_add1 (tsi, ts[0]);
1270 vec_foreach(ts, sa->childs[0].tsr)
1272 if (ikev2_ts_cmp(p_tsr, ts))
1274 vec_add1 (tsr, ts[0]);
1285 vec_free (sa->childs[0].tsi);
1286 vec_free (sa->childs[0].tsr);
1287 sa->childs[0].tsi = tsi;
1288 sa->childs[0].tsr = tsr;
1294 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1299 ikev2_sa_auth (ikev2_sa_t * sa)
1301 ikev2_main_t *km = &ikev2_main;
1302 ikev2_profile_t *p, *sel_p = 0;
1303 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1304 ikev2_sa_transform_t *tr_prf;
1307 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1309 /* only shared key and rsa signature */
1310 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1311 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1313 ikev2_elog_uint (IKEV2_LOG_ERROR,
1314 "unsupported authentication method %u",
1316 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1320 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1321 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1324 ikev2_auth_t *sa_auth;
1326 if (sa->is_initiator)
1329 sa_auth = &sa->r_auth;
1334 sa_auth = &sa->i_auth;
1338 pool_foreach (p, km->profiles, ({
1341 if (p->rem_id.type != sa_id->type ||
1342 vec_len(p->rem_id.data) != vec_len(sa_id->data) ||
1343 memcmp(p->rem_id.data, sa_id->data, vec_len(p->rem_id.data)))
1346 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1348 if (!p->auth.data ||
1349 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1352 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1353 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1355 if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1357 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1364 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1366 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1369 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1371 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1384 sa->udp_encap = sel_p->udp_encap;
1385 sa->dst_port = sel_p->dst_port;
1389 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1391 if (!sa->is_initiator)
1393 vec_free (sa->r_id.data);
1394 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1395 sa->r_id.type = sel_p->loc_id.type;
1397 /* generate our auth data */
1398 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1399 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1401 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1402 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1404 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1406 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1407 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1411 /* select transforms for 1st child sa */
1412 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1413 sa->childs[0].r_proposals =
1414 ikev2_select_proposal (sa->childs[0].i_proposals,
1415 IKEV2_PROTOCOL_ESP);
1417 if (~0 != sel_p->tun_itf)
1419 sa->is_tun_itf_set = 1;
1420 sa->tun_itf = sel_p->tun_itf;
1426 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1427 "profile found! ispi %lx", sa->ispi);
1428 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1436 ikev2_sa_auth_init (ikev2_sa_t * sa)
1438 ikev2_main_t *km = &ikev2_main;
1439 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1440 ikev2_sa_transform_t *tr_prf;
1443 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1445 /* only shared key and rsa signature */
1446 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1447 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1449 ikev2_elog_uint (IKEV2_LOG_ERROR,
1450 "unsupported authentication method %u",
1452 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1456 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1457 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1458 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1459 auth = ikev2_calc_prf (tr_prf, psk, authmsg);
1462 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1464 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1465 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1467 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1469 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1470 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1480 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1482 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1486 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1488 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1498 ipsec_sa_flags_t flags;
1501 ipsec_crypto_alg_t encr_type;
1502 ipsec_integ_alg_t integ_type;
1503 ip46_address_t local_ip;
1504 ip46_address_t remote_ip;
1505 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1507 u32 old_remote_sa_id;
1509 } ikev2_add_ipsec_tunnel_args_t;
1512 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1514 ikev2_main_t *km = &ikev2_main;
1518 if (~0 == a->sw_if_index)
1520 /* no tunnel associated with the SA/profile - create a new one */
1521 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1522 &a->local_ip, &a->remote_ip, 0,
1523 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1524 TUNNEL_MODE_P2P, &sw_if_index);
1526 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1528 if (hash_get (km->sw_if_indices, sw_if_index))
1529 /* interface is managed by IKE; proceed with updating SAs */
1532 hash_set1 (km->sw_if_indices, sw_if_index);
1536 sw_if_index = a->sw_if_index;
1537 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1542 ikev2_elog_peers (IKEV2_LOG_ERROR, "installing ipip tunnel failed! "
1543 "loc:%d.%d.%d.%d rem:%d.%d.%d.%d",
1544 a->local_ip.ip4.as_u32, a->remote_ip.ip4.as_u32);
1549 vec_add1 (sas_in, a->remote_sa_id);
1552 ipsec_tun_protect_del (sw_if_index, NULL);
1554 /* replace local SA immediately */
1555 ipsec_sa_unlock_id (a->local_sa_id);
1557 /* keep the old sa */
1558 vec_add1 (sas_in, a->old_remote_sa_id);
1561 rv |= ipsec_sa_add_and_lock (a->local_sa_id,
1563 IPSEC_PROTOCOL_ESP, a->encr_type,
1564 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1565 a->flags, 0, a->salt_local, &a->local_ip,
1566 &a->remote_ip, NULL, a->dst_port);
1567 rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1568 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1569 a->integ_type, &a->rem_ikey,
1570 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1571 a->salt_remote, &a->remote_ip,
1572 &a->local_ip, NULL, a->dst_port);
1574 rv |= ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1578 ikev2_create_tunnel_interface (vnet_main_t * vnm,
1581 ikev2_child_sa_t * child, u32 sa_index,
1582 u32 child_index, u8 is_rekey)
1584 ikev2_main_t *km = &ikev2_main;
1585 ipsec_crypto_alg_t encr_type;
1586 ipsec_integ_alg_t integ_type;
1587 ikev2_profile_t *p = 0;
1588 ikev2_sa_transform_t *tr;
1589 ikev2_sa_proposal_t *proposals;
1591 ikev2_add_ipsec_tunnel_args_t a;
1593 clib_memset (&a, 0, sizeof (a));
1595 if (!child->r_proposals)
1597 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1601 if (sa->is_initiator)
1603 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1604 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1605 proposals = child->i_proposals;
1606 a.local_spi = child->r_proposals[0].spi;
1607 a.remote_spi = child->i_proposals[0].spi;
1611 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1612 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1613 proposals = child->r_proposals;
1614 a.local_spi = child->i_proposals[0].spi;
1615 a.remote_spi = child->r_proposals[0].spi;
1618 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1619 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1621 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1622 a.is_rekey = is_rekey;
1624 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1625 if (tr && tr->esn_type)
1626 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1628 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1631 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1633 switch (tr->key_len)
1636 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1639 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1642 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1645 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1650 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1653 switch (tr->key_len)
1656 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1659 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1662 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1665 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1673 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1679 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1682 a.encr_type = encr_type;
1686 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1689 switch (tr->integ_type)
1691 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1692 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1694 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1695 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1697 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1698 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1700 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1701 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1704 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1710 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1716 integ_type = IPSEC_INTEG_ALG_NONE;
1719 a.integ_type = integ_type;
1720 ikev2_calc_child_keys (sa, child);
1722 if (sa->is_initiator)
1724 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
1725 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
1726 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
1727 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
1730 a.salt_remote = child->salt_er;
1731 a.salt_local = child->salt_ei;
1736 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
1737 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
1738 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
1739 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
1742 a.salt_remote = child->salt_ei;
1743 a.salt_local = child->salt_er;
1747 if (sa->is_profile_index_set)
1748 p = pool_elt_at_index (km->profiles, sa->profile_index);
1750 if (p && p->lifetime)
1752 child->time_to_expiration =
1753 vlib_time_now (vnm->vlib_main) + p->lifetime;
1754 if (p->lifetime_jitter)
1756 // This is not much better than rand(3), which Coverity warns
1757 // is unsuitable for security applications; random_u32 is
1758 // however fast. If this perturbance to the expiration time
1759 // needs to use a better RNG then we may need to use something
1760 // like /dev/urandom which has significant overhead.
1761 u32 rnd = (u32) (vlib_time_now (vnm->vlib_main) * 1e6);
1762 rnd = random_u32 (&rnd);
1764 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
1768 if (thread_index & 0xffffffc0)
1769 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
1771 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
1772 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
1774 child->local_sa_id =
1776 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
1778 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
1783 /* create a new remote SA ID to keep the old SA for a bit longer
1784 * so the peer has some time to swap their SAs */
1786 /* use most significat bit of child index part in id */
1788 if (sa->current_remote_id_mask)
1790 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
1791 sa->current_remote_id_mask = 0;
1795 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
1796 sa->current_remote_id_mask = mask;
1797 remote_sa_id |= mask;
1799 sa->old_id_expiration = 3.0;
1800 sa->old_remote_id_present = 1;
1803 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
1805 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
1806 a.dst_port = sa->dst_port;
1808 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
1809 (u8 *) & a, sizeof (a));
1815 ip46_address_t local_ip;
1816 ip46_address_t remote_ip;
1820 } ikev2_del_ipsec_tunnel_args_t;
1822 static_always_inline u32
1823 ikev2_flip_alternate_sa_bit (u32 id)
1832 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
1834 ikev2_main_t *km = &ikev2_main;
1835 ipip_tunnel_t *ipip = NULL;
1838 if (~0 == a->sw_if_index)
1841 ipip_tunnel_key_t key = {
1843 .dst = a->remote_ip,
1844 .transport = IPIP_TRANSPORT_IP4,
1849 ipip = ipip_tunnel_db_find (&key);
1853 sw_if_index = ipip->sw_if_index;
1854 hash_unset (km->sw_if_indices, ipip->sw_if_index);
1861 sw_if_index = a->sw_if_index;
1862 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
1865 if (~0 != sw_if_index)
1866 ipsec_tun_protect_del (sw_if_index, NULL);
1868 ipsec_sa_unlock_id (a->remote_sa_id);
1869 ipsec_sa_unlock_id (a->local_sa_id);
1870 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
1873 ipip_del_tunnel (ipip->sw_if_index);
1877 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1878 ikev2_child_sa_t * child)
1880 ikev2_del_ipsec_tunnel_args_t a;
1882 clib_memset (&a, 0, sizeof (a));
1884 if (sa->is_initiator)
1886 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1887 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1891 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1892 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1895 a.remote_sa_id = child->remote_sa_id;
1896 a.local_sa_id = child->local_sa_id;
1897 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
1899 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
1905 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user)
1908 ike_payload_header_t *ph;
1912 ikev2_sa_transform_t *tr_encr, *tr_integ;
1914 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1916 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1918 ikev2_payload_chain_t *chain = 0;
1919 ikev2_payload_new_chain (chain);
1921 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1923 if (sa->r_proposals == 0)
1925 ikev2_payload_add_notify (chain,
1926 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1927 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1929 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
1931 u8 *data = vec_new (u8, 2);
1932 ikev2_sa_transform_t *tr_dh;
1934 ikev2_sa_get_td_for_type (sa->r_proposals,
1935 IKEV2_TRANSFORM_TYPE_DH);
1936 ASSERT (tr_dh && tr_dh->dh_type);
1938 data[0] = (tr_dh->dh_type >> 8) & 0xff;
1939 data[1] = (tr_dh->dh_type) & 0xff;
1941 ikev2_payload_add_notify (chain,
1942 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
1945 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1947 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1949 u8 *data = vec_new (u8, 1);
1951 data[0] = sa->unsupported_cp;
1952 ikev2_payload_add_notify (chain,
1953 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1959 ike->rspi = clib_host_to_net_u64 (sa->rspi);
1960 ikev2_payload_add_sa (chain, sa->r_proposals);
1961 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
1962 ikev2_payload_add_nonce (chain, sa->r_nonce);
1965 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
1967 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1969 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1970 ikev2_payload_add_auth (chain, &sa->r_auth);
1971 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
1972 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1973 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1975 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1977 ikev2_payload_add_notify (chain,
1978 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
1980 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1982 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
1984 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
1986 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1987 ikev2_payload_add_auth (chain, &sa->r_auth);
1989 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
1991 ikev2_payload_add_notify (chain,
1992 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1993 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1994 ikev2_payload_add_auth (chain, &sa->r_auth);
1995 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1996 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1998 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2000 u8 *data = vec_new (u8, 1);
2002 data[0] = sa->unsupported_cp;
2003 ikev2_payload_add_notify (chain,
2004 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2008 else if (sa->state == IKEV2_STATE_SA_INIT)
2010 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2011 ikev2_payload_add_auth (chain, &sa->i_auth);
2012 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2013 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2014 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2015 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2020 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2024 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2026 /* if pending delete */
2029 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2031 if (sa->is_initiator)
2032 ikev2_payload_add_delete (chain, sa->del);
2034 /* The response to a request that deletes the IKE SA is an empty
2035 INFORMATIONAL response. */
2036 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2038 /* The response to a request that deletes ESP or AH SAs will contain
2039 delete payloads for the paired SAs going in the other direction. */
2042 ikev2_payload_add_delete (chain, sa->del);
2047 /* received N(AUTHENTICATION_FAILED) */
2048 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2050 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2053 /* received unsupported critical payload */
2054 else if (sa->unsupported_cp)
2056 u8 *data = vec_new (u8, 1);
2058 data[0] = sa->unsupported_cp;
2059 ikev2_payload_add_notify (chain,
2060 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2063 sa->unsupported_cp = 0;
2065 /* else send empty response */
2067 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2069 if (sa->is_initiator)
2072 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2073 ikev2_notify_t notify;
2074 u8 *data = vec_new (u8, 4);
2075 clib_memset (¬ify, 0, sizeof (notify));
2076 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2077 notify.spi = sa->childs[0].i_proposals->spi;
2078 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2080 ikev2_payload_add_sa (chain, proposals);
2081 ikev2_payload_add_nonce (chain, sa->i_nonce);
2082 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2083 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2084 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2093 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2094 ikev2_payload_add_nonce (chain, sa->r_nonce);
2095 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2097 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2099 vec_del1 (sa->rekey, 0);
2101 else if (sa->unsupported_cp)
2103 u8 *data = vec_new (u8, 1);
2105 data[0] = sa->unsupported_cp;
2106 ikev2_payload_add_notify (chain,
2107 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2110 sa->unsupported_cp = 0;
2114 ikev2_payload_add_notify (chain,
2115 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2122 ike->version = IKE_VERSION_2;
2123 ike->nextpayload = IKEV2_PAYLOAD_SK;
2124 tlen = sizeof (*ike);
2125 if (sa->is_initiator)
2127 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
2128 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
2132 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
2136 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2138 tlen += vec_len (chain->data);
2139 ike->nextpayload = chain->first_payload_type;
2140 ike->length = clib_host_to_net_u32 (tlen);
2141 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2143 /* store whole IKE payload - needed for PSK auth */
2144 vec_free (sa->last_sa_init_res_packet_data);
2145 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2150 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2153 plen = sizeof (*ph);
2154 ph = (ike_payload_header_t *) & ike->payload[0];
2155 ph->nextpayload = chain->first_payload_type;
2157 int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload);
2160 /* add space for hmac */
2161 plen += tr_integ->key_trunc;
2164 /* payload and total length */
2165 ph->length = clib_host_to_net_u16 (plen);
2166 ike->length = clib_host_to_net_u32 (tlen);
2168 /* calc integrity data for whole packet except hash itself */
2170 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2171 (u8 *) ike, tlen - tr_integ->key_trunc);
2173 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2174 sizeof (*ike), integ, tr_integ->key_trunc);
2176 /* store whole IKE payload - needed for retransmit */
2177 vec_free (sa->last_res_packet_data);
2178 vec_add (sa->last_res_packet_data, ike, tlen);
2182 ikev2_payload_destroy_chain (chain);
2188 ikev2_retransmit_sa_init (ike_header_t * ike,
2189 ip4_address_t iaddr, ip4_address_t raddr)
2191 ikev2_main_t *km = &ikev2_main;
2193 u32 thread_index = vlib_get_thread_index ();
2196 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
2197 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
2198 sa->iaddr.as_u32 == iaddr.as_u32 &&
2199 sa->raddr.as_u32 == raddr.as_u32)
2202 u32 len = clib_net_to_host_u32(ike->length);
2203 u8 payload = ike->nextpayload;
2205 while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
2206 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
2207 u32 plen = clib_net_to_host_u16(ikep->length);
2209 if (plen < sizeof(ike_payload_header_t))
2212 if (payload == IKEV2_PAYLOAD_NONCE)
2214 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
2216 /* req is retransmit */
2217 if (sa->state == IKEV2_STATE_SA_INIT)
2220 tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
2221 ike->ispi = tmp->ispi;
2222 ike->rspi = tmp->rspi;
2223 ike->nextpayload = tmp->nextpayload;
2224 ike->version = tmp->version;
2225 ike->exchange = tmp->exchange;
2226 ike->flags = tmp->flags;
2227 ike->msgid = tmp->msgid;
2228 ike->length = tmp->length;
2229 clib_memcpy_fast(ike->payload, tmp->payload,
2230 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
2231 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2232 "ispi %lx IKE_SA_INIT retransmit "
2233 "from %d.%d.%d.%d to %d.%d.%d.%d",
2235 raddr.as_u32, iaddr.as_u32);
2238 /* else ignore req */
2241 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2242 "ispi %lx IKE_SA_INIT ignore "
2243 "from %d.%d.%d.%d to %d.%d.%d.%d",
2245 raddr.as_u32, iaddr.as_u32);
2250 payload = ikep->nextpayload;
2257 /* req is not retransmit */
2262 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2264 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2267 if (msg_id > sa->last_msg_id)
2269 sa->last_msg_id = msg_id;
2272 /* retransmitted req */
2273 else if (msg_id == sa->last_msg_id)
2276 tmp = (ike_header_t *) sa->last_res_packet_data;
2277 ike->ispi = tmp->ispi;
2278 ike->rspi = tmp->rspi;
2279 ike->nextpayload = tmp->nextpayload;
2280 ike->version = tmp->version;
2281 ike->exchange = tmp->exchange;
2282 ike->flags = tmp->flags;
2283 ike->msgid = tmp->msgid;
2284 ike->length = tmp->length;
2285 clib_memcpy_fast (ike->payload, tmp->payload,
2286 clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
2287 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2288 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2291 /* old req ignore */
2294 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2295 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2302 ikev2_node_fn (vlib_main_t * vm,
2303 vlib_node_runtime_t * node, vlib_frame_t * frame)
2305 u32 n_left_from, *from, *to_next;
2306 ikev2_next_t next_index;
2307 ikev2_main_t *km = &ikev2_main;
2308 u32 thread_index = vlib_get_thread_index ();
2310 from = vlib_frame_vector_args (frame);
2311 n_left_from = frame->n_vectors;
2312 next_index = node->cached_next_index;
2314 while (n_left_from > 0)
2318 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2320 while (n_left_from > 0 && n_left_to_next > 0)
2324 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2329 ikev2_sa_t *sa0 = 0;
2330 ikev2_sa_t sa; /* temporary store for SA */
2334 /* speculatively enqueue b0 to the current next frame */
2340 n_left_to_next -= 1;
2342 b0 = vlib_get_buffer (vm, bi0);
2343 ike0 = vlib_buffer_get_current (b0);
2344 vlib_buffer_advance (b0, -sizeof (*udp0));
2345 udp0 = vlib_buffer_get_current (b0);
2346 vlib_buffer_advance (b0, -sizeof (*ip40));
2347 ip40 = vlib_buffer_get_current (b0);
2349 if (ike0->version != IKE_VERSION_2)
2351 vlib_node_increment_counter (vm, ikev2_node.index,
2352 IKEV2_ERROR_NOT_IKEV2, 1);
2356 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2359 clib_memset (sa0, 0, sizeof (*sa0));
2361 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2363 if (ike0->rspi == 0)
2365 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2366 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2368 r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2372 vlib_node_increment_counter (vm, ikev2_node.index,
2373 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2375 len = clib_net_to_host_u32 (ike0->length);
2380 vlib_node_increment_counter (vm, ikev2_node.index,
2381 IKEV2_ERROR_IKE_SA_INIT_IGNORE,
2386 ikev2_process_sa_init_req (vm, sa0, ike0);
2388 if (sa0->state == IKEV2_STATE_SA_INIT)
2390 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2392 ikev2_select_proposal (sa0->i_proposals,
2393 IKEV2_PROTOCOL_IKE);
2394 ikev2_generate_sa_init_data (sa0);
2397 if (sa0->state == IKEV2_STATE_SA_INIT
2398 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2400 len = ikev2_generate_message (sa0, ike0, 0);
2403 if (sa0->state == IKEV2_STATE_SA_INIT)
2405 /* add SA to the pool */
2406 pool_get (km->per_thread_data[thread_index].sas,
2408 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2410 per_thread_data[thread_index].sa_by_rspi,
2413 km->per_thread_data[thread_index].sas);
2417 ikev2_sa_free_all_vec (sa0);
2421 else //received sa_init without initiator flag
2423 ikev2_process_sa_init_resp (vm, sa0, ike0);
2425 if (sa0->state == IKEV2_STATE_SA_INIT)
2427 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2428 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2432 pool_elt_at_index (km->sais, p[0]);
2434 ikev2_complete_sa_data (sa0, sai);
2435 ikev2_calc_keys (sa0);
2436 ikev2_sa_auth_init (sa0);
2437 len = ikev2_generate_message (sa0, ike0, 0);
2441 if (sa0->state == IKEV2_STATE_SA_INIT)
2443 /* add SA to the pool */
2444 pool_get (km->per_thread_data[thread_index].sas, sa0);
2445 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2446 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2448 sa0 - km->per_thread_data[thread_index].sas);
2452 ikev2_sa_free_all_vec (sa0);
2456 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2459 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2460 clib_net_to_host_u64 (ike0->rspi));
2464 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2467 r = ikev2_retransmit_resp (sa0, ike0);
2470 vlib_node_increment_counter (vm, ikev2_node.index,
2471 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2473 len = clib_net_to_host_u32 (ike0->length);
2478 vlib_node_increment_counter (vm, ikev2_node.index,
2479 IKEV2_ERROR_IKE_REQ_IGNORE,
2484 ikev2_process_auth_req (vm, sa0, ike0);
2485 ikev2_sa_auth (sa0);
2486 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2488 ikev2_initial_contact_cleanup (sa0);
2489 ikev2_sa_match_ts (sa0);
2490 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2491 ikev2_create_tunnel_interface (km->vnet_main,
2497 if (sa0->is_initiator)
2499 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2503 pool_elt_at_index (km->sais, p[0]);
2504 hash_unset (km->sa_by_ispi, sai->ispi);
2505 ikev2_sa_free_all_vec (sai);
2506 pool_put (km->sais, sai);
2511 len = ikev2_generate_message (sa0, ike0, 0);
2515 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2518 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2519 clib_net_to_host_u64 (ike0->rspi));
2523 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2526 r = ikev2_retransmit_resp (sa0, ike0);
2529 vlib_node_increment_counter (vm, ikev2_node.index,
2530 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2532 len = clib_net_to_host_u32 (ike0->length);
2537 vlib_node_increment_counter (vm, ikev2_node.index,
2538 IKEV2_ERROR_IKE_REQ_IGNORE,
2543 ikev2_process_informational_req (vm, sa0, ike0);
2546 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2548 ikev2_delete_t *d, *tmp, *resp = 0;
2549 vec_foreach (d, sa0->del)
2551 ikev2_child_sa_t *ch_sa;
2552 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2554 !sa0->is_initiator);
2557 ikev2_delete_tunnel_interface (km->vnet_main,
2559 if (!sa0->is_initiator)
2561 vec_add2 (resp, tmp, 1);
2562 tmp->protocol_id = d->protocol_id;
2563 tmp->spi = ch_sa->r_proposals[0].spi;
2565 ikev2_sa_del_child_sa (sa0, ch_sa);
2568 if (!sa0->is_initiator)
2570 vec_free (sa0->del);
2575 if (!sa0->is_initiator)
2577 len = ikev2_generate_message (sa0, ike0, 0);
2581 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2584 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2585 clib_net_to_host_u64 (ike0->rspi));
2589 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2592 r = ikev2_retransmit_resp (sa0, ike0);
2595 vlib_node_increment_counter (vm, ikev2_node.index,
2596 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2598 len = clib_net_to_host_u32 (ike0->length);
2603 vlib_node_increment_counter (vm, ikev2_node.index,
2604 IKEV2_ERROR_IKE_REQ_IGNORE,
2609 ikev2_process_create_child_sa_req (vm, sa0, ike0);
2612 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2615 vec_free (sa0->childs);
2616 ikev2_child_sa_t *child;
2617 vec_add2 (sa0->childs, child, 1);
2618 child->r_proposals = sa0->rekey[0].r_proposal;
2619 child->i_proposals = sa0->rekey[0].i_proposal;
2620 child->tsi = sa0->rekey[0].tsi;
2621 child->tsr = sa0->rekey[0].tsr;
2622 ikev2_create_tunnel_interface (km->vnet_main,
2625 child - sa0->childs,
2628 if (sa0->is_initiator)
2630 vec_del1 (sa0->rekey, 0);
2634 len = ikev2_generate_message (sa0, ike0, 0);
2641 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2642 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2644 ip40->src_address.as_u32,
2645 ip40->dst_address.as_u32);
2649 /* if we are sending packet back, rewrite headers */
2652 next0 = IKEV2_NEXT_IP4_LOOKUP;
2653 if (sa0->is_initiator)
2655 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2656 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2660 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2661 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2664 clib_host_to_net_u16 (len + sizeof (udp_header_t));
2666 b0->current_length =
2667 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2668 ip40->length = clib_host_to_net_u16 (b0->current_length);
2669 ip40->checksum = ip4_header_checksum (ip40);
2672 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2673 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2675 ikev2_child_sa_t *c;
2677 vec_foreach (c, sa0->childs)
2678 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2680 ikev2_delete_sa (sa0);
2682 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2684 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2685 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2687 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2688 t->sw_if_index = sw_if_index0;
2689 t->next_index = next0;
2692 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2693 n_left_to_next, bi0, next0);
2696 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2699 vlib_node_increment_counter (vm, ikev2_node.index,
2700 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2701 return frame->n_vectors;
2705 VLIB_REGISTER_NODE (ikev2_node,static) = {
2706 .function = ikev2_node_fn,
2708 .vector_size = sizeof (u32),
2709 .format_trace = format_ikev2_trace,
2710 .type = VLIB_NODE_TYPE_INTERNAL,
2712 .n_errors = ARRAY_LEN(ikev2_error_strings),
2713 .error_strings = ikev2_error_strings,
2715 .n_next_nodes = IKEV2_N_NEXT,
2718 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2719 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2724 // set ikev2 proposals when vpp is used as initiator
2725 static clib_error_t *
2726 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
2727 ikev2_transforms_set * ts,
2728 ikev2_sa_proposal_t ** proposals, int is_ike)
2731 ikev2_main_t *km = &ikev2_main;
2732 ikev2_sa_proposal_t *proposal;
2733 vec_add2 (*proposals, proposal, 1);
2734 ikev2_sa_transform_t *td;
2739 vec_foreach (td, km->supported_transforms)
2741 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
2742 && td->encr_type == ts->crypto_alg
2743 && td->key_len == ts->crypto_key_size / 8)
2746 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
2747 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
2748 vec_add (td->attrs, (u8 *) attr, 4);
2749 vec_add1 (proposal->transforms, *td);
2758 r = clib_error_return (0, "Unsupported algorithm");
2762 if (IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16 != ts->crypto_alg)
2766 vec_foreach (td, km->supported_transforms)
2768 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
2769 && td->integ_type == ts->integ_alg)
2771 vec_add1 (proposal->transforms, *td);
2779 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
2780 r = clib_error_return (0, "Unsupported algorithm");
2789 vec_foreach (td, km->supported_transforms)
2791 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
2792 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
2794 vec_add1 (proposal->transforms, *td);
2801 r = clib_error_return (0, "Unsupported algorithm");
2807 if (is_ike || ts->dh_type != IKEV2_TRANSFORM_DH_TYPE_NONE)
2810 vec_foreach (td, km->supported_transforms)
2812 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
2814 vec_add1 (proposal->transforms, *td);
2817 sa->dh_group = td->dh_type;
2825 r = clib_error_return (0, "Unsupported algorithm");
2833 vec_foreach (td, km->supported_transforms)
2835 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
2837 vec_add1 (proposal->transforms, *td);
2844 r = clib_error_return (0, "Unsupported algorithm");
2853 static ikev2_profile_t *
2854 ikev2_profile_index_by_name (u8 * name)
2856 ikev2_main_t *km = &ikev2_main;
2859 p = mhash_get (&km->profile_index_by_name, name);
2863 return pool_elt_at_index (km->profiles, p[0]);
2868 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
2877 b0 = vlib_get_buffer (vm, bi0);
2878 vlib_buffer_advance (b0, -sizeof (udp_header_t));
2879 udp0 = vlib_buffer_get_current (b0);
2880 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
2881 ip40 = vlib_buffer_get_current (b0);
2884 ip40->ip_version_and_header_length = 0x45;
2886 ip40->fragment_id = 0;
2887 ip40->flags_and_fragment_offset = 0;
2889 ip40->protocol = IP_PROTOCOL_UDP;
2890 ip40->dst_address.as_u32 = dst->as_u32;
2891 ip40->src_address.as_u32 = src->as_u32;
2892 udp0->dst_port = clib_host_to_net_u16 (500);
2893 udp0->src_port = clib_host_to_net_u16 (500);
2894 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
2896 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2897 ip40->length = clib_host_to_net_u16 (b0->current_length);
2898 ip40->checksum = ip4_header_checksum (ip40);
2901 /* send the request */
2902 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
2903 to_next = vlib_frame_vector_args (f);
2906 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
2911 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
2914 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2919 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
2920 *ike = vlib_buffer_get_current (b0);
2925 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
2927 ikev2_main_t *km = &ikev2_main;
2929 km->pkey = ikev2_load_key_file (file);
2930 if (km->pkey == NULL)
2931 return clib_error_return (0, "load key '%s' failed", file);
2936 static_always_inline vnet_api_error_t
2937 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
2939 ikev2_main_t *km = &ikev2_main;
2940 udp_dst_port_info_t *pi;
2942 uword *v = hash_get (km->udp_ports, port);
2943 pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4);
2947 /* IKE already uses this port, only increment reference counter */
2954 return VNET_API_ERROR_UDP_PORT_TAKEN;
2956 udp_register_dst_port (km->vlib_main, port,
2957 ipsec4_tun_input_node.index, 1);
2958 hash_set (km->udp_ports, port, 1);
2964 static_always_inline void
2965 ikev2_unregister_udp_port (ikev2_profile_t * p)
2967 ikev2_main_t *km = &ikev2_main;
2970 if (p->dst_port == IPSEC_UDP_PORT_NONE)
2973 v = hash_get (km->udp_ports, p->dst_port);
2981 udp_unregister_dst_port (km->vlib_main, p->dst_port, 1);
2982 hash_unset (km->udp_ports, p->dst_port);
2985 p->dst_port = IPSEC_UDP_PORT_NONE;
2989 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
2991 ikev2_main_t *km = &ikev2_main;
2996 if (ikev2_profile_index_by_name (name))
2997 return clib_error_return (0, "policy %v already exists", name);
2999 pool_get (km->profiles, p);
3000 clib_memset (p, 0, sizeof (*p));
3001 p->name = vec_dup (name);
3002 p->dst_port = IPSEC_UDP_PORT_NONE;
3003 p->responder.sw_if_index = ~0;
3005 uword index = p - km->profiles;
3006 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3010 p = ikev2_profile_index_by_name (name);
3012 return clib_error_return (0, "policy %v does not exists", name);
3014 ikev2_unregister_udp_port (p);
3017 pool_put (km->profiles, p);
3018 mhash_unset (&km->profile_index_by_name, name, 0);
3024 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3025 u8 * auth_data, u8 data_hex_format)
3030 p = ikev2_profile_index_by_name (name);
3034 r = clib_error_return (0, "unknown profile %v", name);
3037 vec_free (p->auth.data);
3038 p->auth.method = auth_method;
3039 p->auth.data = vec_dup (auth_data);
3040 p->auth.hex = data_hex_format;
3042 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3044 vec_add1 (p->auth.data, 0);
3046 EVP_PKEY_free (p->auth.key);
3047 p->auth.key = ikev2_load_cert_file (auth_data);
3048 if (p->auth.key == NULL)
3049 return clib_error_return (0, "load cert '%s' failed", auth_data);
3056 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3062 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
3063 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
3065 r = clib_error_return (0, "unsupported identity type %U",
3066 format_ikev2_id_type, id_type);
3070 p = ikev2_profile_index_by_name (name);
3074 r = clib_error_return (0, "unknown profile %v", name);
3080 vec_free (p->loc_id.data);
3081 p->loc_id.type = id_type;
3082 p->loc_id.data = vec_dup (data);
3086 vec_free (p->rem_id.data);
3087 p->rem_id.type = id_type;
3088 p->rem_id.data = vec_dup (data);
3095 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
3096 u16 start_port, u16 end_port, ip4_address_t start_addr,
3097 ip4_address_t end_addr, int is_local)
3102 p = ikev2_profile_index_by_name (name);
3106 r = clib_error_return (0, "unknown profile %v", name);
3112 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
3113 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
3114 p->loc_ts.start_port = start_port;
3115 p->loc_ts.end_port = end_port;
3116 p->loc_ts.protocol_id = protocol_id;
3117 p->loc_ts.ts_type = 7;
3121 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
3122 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
3123 p->rem_ts.start_port = start_port;
3124 p->rem_ts.end_port = end_port;
3125 p->rem_ts.protocol_id = protocol_id;
3126 p->rem_ts.ts_type = 7;
3134 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
3135 u32 sw_if_index, ip4_address_t ip4)
3140 p = ikev2_profile_index_by_name (name);
3144 r = clib_error_return (0, "unknown profile %v", name);
3148 p->responder.sw_if_index = sw_if_index;
3149 p->responder.ip4 = ip4;
3155 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
3156 ikev2_transform_encr_type_t crypto_alg,
3157 ikev2_transform_integ_type_t integ_alg,
3158 ikev2_transform_dh_type_t dh_type,
3159 u32 crypto_key_size)
3164 p = ikev2_profile_index_by_name (name);
3168 r = clib_error_return (0, "unknown profile %v", name);
3172 p->ike_ts.crypto_alg = crypto_alg;
3173 p->ike_ts.integ_alg = integ_alg;
3174 p->ike_ts.dh_type = dh_type;
3175 p->ike_ts.crypto_key_size = crypto_key_size;
3180 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
3181 ikev2_transform_encr_type_t crypto_alg,
3182 ikev2_transform_integ_type_t integ_alg,
3183 ikev2_transform_dh_type_t dh_type,
3184 u32 crypto_key_size)
3189 p = ikev2_profile_index_by_name (name);
3193 r = clib_error_return (0, "unknown profile %v", name);
3197 p->esp_ts.crypto_alg = crypto_alg;
3198 p->esp_ts.integ_alg = integ_alg;
3199 p->esp_ts.dh_type = dh_type;
3200 p->esp_ts.crypto_key_size = crypto_key_size;
3205 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
3206 u8 * name, u32 sw_if_index)
3211 p = ikev2_profile_index_by_name (name);
3215 r = clib_error_return (0, "unknown profile %v", name);
3219 p->tun_itf = sw_if_index;
3225 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
3228 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3229 ikev2_main_t *km = &ikev2_main;
3230 vnet_api_error_t rv = 0;
3234 return VNET_API_ERROR_INVALID_VALUE;
3238 if (p->dst_port != IPSEC_UDP_PORT_NONE)
3239 return VNET_API_ERROR_VALUE_EXIST;
3241 rv = ikev2_register_udp_port (p, port);
3245 v = hash_get (km->udp_ports, port);
3247 return VNET_API_ERROR_IKE_NO_PORT;
3249 if (p->dst_port == IPSEC_UDP_PORT_NONE)
3250 return VNET_API_ERROR_INVALID_VALUE;
3252 ikev2_unregister_udp_port (p);
3258 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
3260 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3265 r = clib_error_return (0, "unknown profile %v", name);
3274 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
3275 u64 lifetime, u32 jitter, u32 handover,
3281 p = ikev2_profile_index_by_name (name);
3285 r = clib_error_return (0, "unknown profile %v", name);
3289 p->lifetime = lifetime;
3290 p->lifetime_jitter = jitter;
3291 p->handover = handover;
3292 p->lifetime_maxdata = maxdata;
3297 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
3301 ip4_main_t *im = &ip4_main;
3302 ikev2_main_t *km = &ikev2_main;
3304 p = ikev2_profile_index_by_name (name);
3308 r = clib_error_return (0, "unknown profile %v", name);
3312 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
3314 r = clib_error_return (0, "responder not set for profile %v", name);
3319 /* Create the Initiator Request */
3323 ip_lookup_main_t *lm = &im->lookup_main;
3325 int len = sizeof (ike_header_t);
3327 /* Get own iface IP */
3329 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
3330 ip_interface_address_t *if_add =
3331 pool_elt_at_index (lm->if_address_pool, if_add_index0);
3332 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
3334 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3336 /* Prepare the SA and the IKE payload */
3338 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
3339 ikev2_payload_chain_t *chain = 0;
3340 ikev2_payload_new_chain (chain);
3342 /* Build the IKE proposal payload */
3343 ikev2_sa_proposal_t *proposals = 0;
3344 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
3345 proposals[0].proposal_num = 1;
3346 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
3348 /* Add and then cleanup proposal data */
3349 ikev2_payload_add_sa (chain, proposals);
3350 ikev2_sa_free_proposal_vector (&proposals);
3352 sa.is_initiator = 1;
3353 sa.profile_index = km->profiles - p;
3354 sa.is_profile_index_set = 1;
3355 sa.state = IKEV2_STATE_SA_INIT;
3356 sa.tun_itf = p->tun_itf;
3357 sa.udp_encap = p->udp_encap;
3358 sa.dst_port = p->dst_port;
3359 sa.is_tun_itf_set = 1;
3360 sa.initial_contact = 1;
3361 ikev2_generate_sa_init_data (&sa);
3362 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
3363 ikev2_payload_add_nonce (chain, sa.i_nonce);
3365 /* Build the child SA proposal */
3366 vec_resize (sa.childs, 1);
3367 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
3368 &sa.childs[0].i_proposals, 0);
3369 sa.childs[0].i_proposals[0].proposal_num = 1;
3370 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
3371 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
3372 sizeof (sa.childs[0].i_proposals[0].spi));
3376 /* Add NAT detection notification messages (mandatory) */
3377 u8 nat_detection_source[8 + 8 + 4 + 2];
3378 u8 *nat_detection_sha1 = vec_new (u8, 20);
3380 u64 tmpspi = clib_host_to_net_u64 (sa.ispi);
3381 clib_memcpy_fast (&nat_detection_source[0], &tmpspi, sizeof (tmpspi));
3382 tmpspi = clib_host_to_net_u64 (sa.rspi);
3383 clib_memcpy_fast (&nat_detection_source[8], &tmpspi, sizeof (tmpspi));
3384 u16 tmpport = clib_host_to_net_u16 (500);
3385 clib_memcpy_fast (&nat_detection_source[8 + 8 + 4], &tmpport,
3387 u32 tmpip = clib_host_to_net_u32 (if_ip->as_u32);
3388 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3389 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3390 nat_detection_sha1);
3391 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
3392 nat_detection_sha1);
3393 tmpip = clib_host_to_net_u32 (p->responder.ip4.as_u32);
3394 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3395 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3396 nat_detection_sha1);
3397 ikev2_payload_add_notify (chain,
3398 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
3399 nat_detection_sha1);
3400 vec_free (nat_detection_sha1);
3402 u8 *sig_hash_algo = vec_new (u8, 8);
3403 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3404 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3405 ikev2_payload_add_notify (chain,
3406 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3408 vec_free (sig_hash_algo);
3411 /* Buffer update and boilerplate */
3412 len += vec_len (chain->data);
3413 ike0->nextpayload = chain->first_payload_type;
3414 ike0->length = clib_host_to_net_u32 (len);
3415 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
3416 ikev2_payload_destroy_chain (chain);
3418 ike0->version = IKE_VERSION_2;
3419 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3420 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3421 ike0->ispi = sa.ispi;
3425 /* store whole IKE payload - needed for PSK auth */
3426 vec_free (sa.last_sa_init_req_packet_data);
3427 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3429 /* add data to the SA then add it to the pool */
3430 sa.iaddr.as_u32 = if_ip->as_u32;
3431 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3432 sa.i_id.type = p->loc_id.type;
3433 sa.i_id.data = vec_dup (p->loc_id.data);
3434 sa.i_auth.method = p->auth.method;
3435 sa.i_auth.hex = p->auth.hex;
3436 sa.i_auth.data = vec_dup (p->auth.data);
3437 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3438 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3440 ikev2_initial_contact_cleanup (&sa);
3442 /* add SA to the pool */
3443 ikev2_sa_t *sa0 = 0;
3444 pool_get (km->sais, sa0);
3445 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3446 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3448 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len);
3450 ikev2_elog_exchange ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to "
3451 "%d.%d.%d.%d", clib_host_to_net_u64 (sa0->ispi), 0,
3452 p->responder.ip4.as_u32);
3459 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3460 ikev2_child_sa_t * csa)
3462 /* Create the Initiator notification for child SA removal */
3463 ikev2_main_t *km = &ikev2_main;
3468 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3471 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3472 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3473 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3474 vec_resize (sa->del, 1);
3475 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3476 sa->del->spi = csa->i_proposals->spi;
3477 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3478 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3479 len = ikev2_generate_message (sa, ike0, 0);
3481 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3483 /* delete local child SA */
3484 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3485 ikev2_sa_del_child_sa (sa, csa);
3489 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3492 ikev2_main_t *km = &ikev2_main;
3493 ikev2_main_per_thread_data_t *tkm;
3494 ikev2_sa_t *fsa = 0;
3495 ikev2_child_sa_t *fchild = 0;
3497 /* Search for the child SA */
3498 vec_foreach (tkm, km->per_thread_data)
3504 pool_foreach (sa, tkm->sas, ({
3505 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3515 if (!fchild || !fsa)
3517 r = clib_error_return (0, "Child SA not found");
3522 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3529 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3532 ikev2_main_t *km = &ikev2_main;
3533 ikev2_main_per_thread_data_t *tkm;
3534 ikev2_sa_t *fsa = 0;
3535 ikev2_main_per_thread_data_t *ftkm = 0;
3537 /* Search for the IKE SA */
3538 vec_foreach (tkm, km->per_thread_data)
3544 pool_foreach (sa, tkm->sas, ({
3545 if (sa->ispi == ispi)
3557 r = clib_error_return (0, "IKE SA not found");
3562 /* Create the Initiator notification for IKE SA removal */
3568 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3571 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3572 ike0->ispi = clib_host_to_net_u64 (fsa->ispi);
3573 ike0->rspi = clib_host_to_net_u64 (fsa->rspi);
3574 vec_resize (fsa->del, 1);
3575 fsa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3576 fsa->del->spi = ispi;
3577 ike0->msgid = clib_host_to_net_u32 (fsa->last_init_msg_id + 1);
3578 fsa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3579 len = ikev2_generate_message (fsa, ike0, 0);
3581 ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len);
3585 /* delete local SA */
3586 ikev2_child_sa_t *c;
3587 vec_foreach (c, fsa->childs)
3589 ikev2_delete_tunnel_interface (km->vnet_main, fsa, c);
3590 ikev2_sa_del_child_sa (fsa, c);
3592 ikev2_sa_free_all_vec (fsa);
3593 uword *p = hash_get (ftkm->sa_by_rspi, fsa->rspi);
3596 hash_unset (ftkm->sa_by_rspi, fsa->rspi);
3597 pool_put (ftkm->sas, fsa);
3605 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3606 ikev2_child_sa_t * csa)
3608 /* Create the Initiator request for create child SA */
3614 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3617 ike0->version = IKE_VERSION_2;
3618 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3619 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3620 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3621 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3622 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3623 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3625 ikev2_rekey_t *rekey;
3626 vec_add2 (sa->rekey, rekey, 1);
3627 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3630 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3631 rekey->spi = proposals[0].spi;
3632 rekey->ispi = csa->i_proposals->spi;
3633 len = ikev2_generate_message (sa, ike0, proposals);
3634 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3635 vec_free (proposals);
3639 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3642 ikev2_main_t *km = &ikev2_main;
3643 ikev2_main_per_thread_data_t *tkm;
3644 ikev2_sa_t *fsa = 0;
3645 ikev2_child_sa_t *fchild = 0;
3647 /* Search for the child SA */
3648 vec_foreach (tkm, km->per_thread_data)
3654 pool_foreach (sa, tkm->sas, ({
3655 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3665 if (!fchild || !fsa)
3667 r = clib_error_return (0, "Child SA not found");
3672 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
3679 ikev2_init (vlib_main_t * vm)
3681 ikev2_main_t *km = &ikev2_main;
3682 vlib_thread_main_t *tm = vlib_get_thread_main ();
3685 clib_memset (km, 0, sizeof (ikev2_main_t));
3686 km->vnet_main = vnet_get_main ();
3689 ikev2_crypto_init (km);
3691 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
3693 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
3694 CLIB_CACHE_LINE_BYTES);
3695 for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
3697 km->per_thread_data[thread_id].sa_by_rspi =
3698 hash_create (0, sizeof (uword));
3701 km->sa_by_ispi = hash_create (0, sizeof (uword));
3702 km->sw_if_indices = hash_create (0, 0);
3703 km->udp_ports = hash_create (0, sizeof (uword));
3705 udp_register_dst_port (vm, 500, ikev2_node.index, 1);
3707 ikev2_cli_reference ();
3709 km->log_level = IKEV2_LOG_ERROR;
3710 km->log_class = vlib_log_register_class ("ikev2", 0);
3715 VLIB_INIT_FUNCTION (ikev2_init) =
3717 .runs_after = VLIB_INITS("ipsec_init"),
3722 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
3725 ikev2_main_t *km = &ikev2_main;
3726 ikev2_profile_t *p = 0;
3727 vlib_main_t *vm = km->vlib_main;
3728 f64 now = vlib_time_now (vm);
3731 if (sa->is_profile_index_set)
3732 p = pool_elt_at_index (km->profiles, sa->profile_index);
3734 if (sa->is_initiator && p && csa->time_to_expiration
3735 && now > csa->time_to_expiration)
3737 if (!csa->is_expired || csa->rekey_retries > 0)
3739 ikev2_rekey_child_sa_internal (vm, sa, csa);
3740 csa->time_to_expiration = now + p->handover;
3741 csa->is_expired = 1;
3742 if (csa->rekey_retries == 0)
3744 csa->rekey_retries = 5;
3746 else if (csa->rekey_retries > 0)
3748 csa->rekey_retries--;
3749 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
3750 csa->i_proposals->spi, csa->rekey_retries);
3751 if (csa->rekey_retries == 0)
3753 csa->rekey_retries = -1;
3760 csa->time_to_expiration = 0;
3761 ikev2_delete_child_sa_internal (vm, sa, csa);
3768 ipip_tunnel_t *ipip = NULL;
3769 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
3770 if (~0 == sw_if_index)
3772 ip46_address_t local_ip;
3773 ip46_address_t remote_ip;
3774 if (sa->is_initiator)
3776 ip46_address_set_ip4 (&local_ip, &sa->iaddr);
3777 ip46_address_set_ip4 (&remote_ip, &sa->raddr);
3781 ip46_address_set_ip4 (&local_ip, &sa->raddr);
3782 ip46_address_set_ip4 (&remote_ip, &sa->iaddr);
3786 ipip_tunnel_key_t key = {
3789 .transport = IPIP_TRANSPORT_IP4,
3794 ipip = ipip_tunnel_db_find (&key);
3797 sw_if_index = ipip->sw_if_index;
3803 vec_add1 (sas_in, csa->remote_sa_id);
3804 ipsec_tun_protect_update (sw_if_index, NULL, csa->local_sa_id, sas_in);
3805 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
3812 ikev2_set_log_level (ikev2_log_level_t log_level)
3814 ikev2_main_t *km = &ikev2_main;
3816 if (log_level >= IKEV2_LOG_MAX)
3818 ikev2_log_error ("unknown logging level %d", log_level);
3822 km->log_level = log_level;
3827 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
3829 ikev2_main_t *km = &ikev2_main;
3830 vlib_main_t *vm = km->vlib_main;
3831 ikev2_main_per_thread_data_t *tkm;
3832 ikev2_sa_t *fsa = 0;
3833 ikev2_profile_t *p = 0;
3834 ikev2_child_sa_t *fchild = 0;
3835 f64 now = vlib_time_now (vm);
3836 vlib_counter_t counts;
3838 /* Search for the SA and child SA */
3839 vec_foreach (tkm, km->per_thread_data)
3845 pool_foreach (sa, tkm->sas, ({
3846 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
3855 vlib_get_combined_counter (&ipsec_sa_counters,
3856 ipsec_sa->stat_index, &counts);
3858 if (fsa && fsa->is_profile_index_set)
3859 p = pool_elt_at_index (km->profiles, fsa->profile_index);
3861 if (fchild && p && p->lifetime_maxdata)
3863 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
3865 fchild->time_to_expiration = now;
3871 ikev2_process_pending_sa_init (ikev2_main_t * km)
3878 hash_foreach (ispi, sai, km->sa_by_ispi,
3880 sa = pool_elt_at_index (km->sais, sai);
3882 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
3885 vlib_buffer_t * b = vlib_get_buffer (km->vlib_main, bi0);
3886 clib_memcpy_fast (vlib_buffer_get_current (b),
3887 sa->last_sa_init_req_packet_data,
3888 vec_len (sa->last_sa_init_req_packet_data));
3889 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
3890 vec_len (sa->last_sa_init_req_packet_data));
3895 static vlib_node_registration_t ikev2_mngr_process_node;
3898 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
3901 ikev2_main_t *km = &ikev2_main;
3902 ipsec_main_t *im = &ipsec_main;
3907 vlib_process_wait_for_event_or_clock (vm, 1);
3908 vlib_process_get_events (vm, NULL);
3910 /* process ike child sas */
3911 ikev2_main_per_thread_data_t *tkm;
3912 vec_foreach (tkm, km->per_thread_data)
3916 pool_foreach (sa, tkm->sas, ({
3917 ikev2_child_sa_t *c;
3919 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
3921 sa->old_remote_id_present = 0;
3925 sa->old_id_expiration -= 1;
3927 vec_foreach (c, sa->childs)
3929 req_sent |= ikev2_mngr_process_child_sa(sa, c, del_old_ids);
3935 /* process ipsec sas */
3938 pool_foreach (sa, im->sad, ({
3939 ikev2_mngr_process_ipsec_sa(sa);
3943 ikev2_process_pending_sa_init (km);
3947 vlib_process_wait_for_event_or_clock (vm, 5);
3948 vlib_process_get_events (vm, NULL);
3957 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
3958 .function = ikev2_mngr_process_fn,
3959 .type = VLIB_NODE_TYPE_PROCESS,
3961 "ikev2-manager-process",
3964 VLIB_PLUGIN_REGISTER () = {
3965 .version = VPP_BUILD_VER,
3966 .description = "Internet Key Exchange (IKEv2) Protocol",
3971 * fd.io coding-style-patch-verification: ON
3974 * eval: (c-set-style "gnu")